Fair Value of Financial Instruments - Assets Measured on Nonrecurring Basis (Details) - USD ($) $ in Thousands	Jun. 30, 2017	Dec. 31, 2016
Level 1
Assets:
Loans held for sale	$ 0	$ 0
Level 2
Assets:
Loans held for sale	2,379	5,996
Level 3
Assets:
Loans held for sale	0	0
Fair Value, Measurements, Nonrecurring
Assets:
Loans held for sale	2,379	5,996
Impaired loans, net of valuation allowance	1,534	2,151
Other real estate owned, net	1,686	1,328
Fair Value, Measurements, Nonrecurring | Level 1
Assets:
Loans held for sale	0	0
Impaired loans, net of valuation allowance	0	0
Other real estate owned, net	0	0
Fair Value, Measurements, Nonrecurring | Level 2
Assets:
Loans held for sale	2,379	5,996
Impaired loans, net of valuation allowance	0	0
Other real estate owned, net	0	0
Fair Value, Measurements, Nonrecurring | Level 3
Assets:
Loans held for sale	0	0
Impaired loans, net of valuation allowance	1,534	2,151
Other real estate owned, net	$ 1,686	$ 1,328